Question

Answer the following questions:

(i)When a stone is thrown vertically upward with a velocity is continuously decreasing, Why?

(ii)Give an example of motion in which average velocity is zero but average speed is not zero.

Answer 1

1. Gravitational force, the motion of the stone which is thrown vertically upward decrease. At the highest point the stone attained on the floor due to the force of gravitation.
2. Uniform circular motion is the example in which the average velocity is zero but not the average speed (since the distance covered in circular path is not zero).